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Method and system for improving imaging resolution by using square hole type liquid crystal lens and lens

A technology of liquid crystal lens and resolution, which is applied in the parts of TV system, image communication, color TV, etc. It can solve the problems of device complexity and reduce the reliability of the overall system, so as to improve the resolution and ensure the image quality. Effects of rebuilding and improving efficiency

Active Publication Date: 2022-05-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to solve the above problems, relevant researchers use mechanical devices to move sensors or lenses to obtain image sequences with known displacements, which also brings complexity to the device and reduces the reliability of the overall system

Method used

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  • Method and system for improving imaging resolution by using square hole type liquid crystal lens and lens
  • Method and system for improving imaging resolution by using square hole type liquid crystal lens and lens
  • Method and system for improving imaging resolution by using square hole type liquid crystal lens and lens

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Embodiment 1

[0047] like figure 1 As shown, the present embodiment provides a system for improving the imaging resolution by using a square-hole liquid crystal lens. The camera 8, glass main lens 9, square-hole liquid crystal lens 10, polarizer 11, Target object 12; the optical axis of each optical device coincides, camera 8 and glass main lens 9 are connected by lens interface, glass main lens 9 is close to square hole type liquid crystal lens 10, makes glass main lens 9 and square hole type liquid crystal lens 10 two The distance between the lenses is 0; camera 8, glass main lens 9, square-hole liquid crystal lens 10, and polarizer 11 form an optical system; the sensor resolution of camera 8 is less than or equal to the resolution of glass main lens 9;

[0048] like figure 2 As shown, the square-hole liquid crystal lens 10 is sequentially composed of an upper glass substrate 1, an upper electrode high-impedance film composite substrate layer 2, an upper polymer alignment layer 3, a liq...

Embodiment 2

[0059] This embodiment provides a method for improving imaging resolution by using a square-hole liquid crystal lens, which is realized by using the system described in Embodiment 1, including the following steps:

[0060] (1) Utilize the optical axis movement of the square-hole type liquid crystal lens 10 to acquire an image sequence;

[0061] (2) Obtain high-resolution images based on image sequences using image reconstruction algorithms. The image reconstruction algorithm is an image interpolation method, or a frequency domain method, or other image reconstruction algorithms.

Embodiment 3

[0063] This embodiment provides a method for improving imaging resolution by using a square-hole liquid crystal lens, which is realized by using the system described in Embodiment 1, including the following steps:

[0064] (1) Utilize the optical axis movement of the square-hole type liquid crystal lens 10 to acquire an image sequence;

[0065] Turn on the square-hole liquid crystal lens 10, keep the optical axis of the square-hole liquid crystal lens 10 at the initial position, and take the first image after focusing clearly; adjust the control voltage and phase of the square-hole liquid crystal lens 10 to change the square-hole liquid crystal lens 10 The position of the optical axis, so as to obtain different images with displacement; using the characteristic of continuous movement of the optical axis of the square-hole liquid crystal lens 10, to ensure that the captured image sequence has a sub-pixel displacement, and obtain an image with a sub-pixel displacement.

[0066] ...

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Abstract

The invention provides a method, a system and a lens for improving imaging resolution by using a square hole type liquid crystal lens. The system comprises a camera, a glass main lens, the square hole type liquid crystal lens, a polarizing film and a target object, the method comprises the following steps: (1) acquiring an image sequence by utilizing the optical axis movement of the square hole type liquid crystal lens; and (2) obtaining a high-resolution image by using an image reconstruction algorithm based on the image sequence. Compared with the prior art, the super-resolution sampling of the object is realized on the basis of no mechanical movement, the complexity of the system is reduced, the reliability is improved, and the cost is saved. According to the method, the step of image registration is omitted, and the image calculation efficiency is improved while the image reconstruction effect is ensured. Compared with a previous round hole type optical axis movable lens, the square hole type liquid crystal lens used in the invention is more stable, and the characteristic change of the lens is smaller after the optical axis is moved, so that the obtained image sequence is clearer, and the subsequent resolution improvement effect is better.

Description

technical field [0001] The invention belongs to the technical field of optical imaging, and relates to a method, a system and a lens for improving imaging resolution by using a square-hole liquid crystal lens. Background technique [0002] Liquid crystals are anisotropic. The liquid crystal lens is a liquid crystal optical device that uses electrodes to apply a non-uniform electric field to the liquid crystal to deflect the liquid crystal molecules and form a regular arrangement state, thereby producing the same optical modulation effect as the glass lens. At present, the optical characteristics of the liquid crystal lens are mainly adjusted by changing the distribution state of the electric field. On this basis, the liquid crystal lens can realize the continuous change of focal length and optical axis. The structure of the square-hole liquid crystal lens is from top to bottom: the upper glass substrate, the upper substrate electrode and the high-impedance film, the first ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02F1/29G02F1/1343G02F1/1337H04N5/225
CPCG02F1/294G02F1/13439G02F1/133711H04N23/55
Inventor 陈信慈徐律涵叶茂
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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